The Premium Membership program is a user level on the forum here which includes some benefits. The benefits to regular users will not change, and you will be able to continue to use these forums exactly as you always have been.
The following "Upgrades" come with Premium Membership:
Access to the
300Cforums.com Photo Gallery
300Cforums.com Email Address (johndoe@300cforums.com) (40mb quota)
Access to the
Premium Users Forum Section
Special Rank on the forum (Premium Member)
Premium User Image below your Avatar 
Increased Custom Avatar Size (80 kilobytes instead of 40k)
Increased Private Message Quota (
800 messages instead of 50)
To sign up for Premium Membership, requires a valid and working paypal account or you can pay via credit card as well. It's easy to set one up, and only takes a few seconds.
You can begin the process by going to your "
User Control Panel" and scrolling down. The left hand column has an option labeled "
Paid Subscriptions" - The cost is $30/year and is purely voluntary.
Once you sign up, you will have access to the Premium Users forum, which will contain information and links on how to take full advantage of your special features, such as your email address, photo gallery, etc.
New Features added Jan 2006:
Arcade Games: Premium Members now have access to Arcade Games through Quick Links... Have FUN!
vBPicGallery: Premium Members have 5 Galleries @ 6 photos each vs. Standard Members, who have 1 Gallery @ 3 photos each